Design of Ultra Wideband Patch Antenna for early detection of cancer tumors has been a priority for antenna designers and all those involved in the detection of cancer in general and brain and breast cancer, in particular. Ultra Wideband microstrip antenna design for the above said purpose had been a popular choice. In this paper, various types of antenna and their results are presented in lucid manner which are operating in the range of 3.1 to 10.6 GHz. Softwares are used for designing of such antennas. Designing parameters, gain, bandwidth, return loss have been shown and results are compared. A single element Direct-fed patch antenna with cavity in ground plane was developed on thin substrate having low dielectric constant (εr = 2.94). Ansoft HFSS ver 11 was used to obtain the simulated results.